Systems Administrator – Endpoint & Server Infrastructure

Job description

Position Overview

We are seeking a Senior Systems Administrator to manage and support enterprise endpoint and server infrastructure. This is a hands-on senior-level role responsible for patch management, system upgrades, vulnerability remediation, endpoint management, Windows Server administration, and infrastructure lifecycle management. The ideal candidate has experience supporting 1,000+ endpoints, managing production environments, troubleshooting complex deployment issues, and executing infrastructure changes with minimal business disruption.

Key Responsibilities

Manage enterprise patching across Windows/macOS endpoints and Windows/Linux servers.Administer Microsoft Intune, SCCM/Configuration Manager, and Azure Update Manager.Plan, test, deploy, and monitor OS patches, security updates, feature updates, firmware, drivers, and BIOS updates.Monitor and remediate vulnerabilities, critical CVEs, and patch compliance issues using tools such as Microsoft Defender.Administer and maintain Windows Server 2016–2025 environments, including patching, upgrades, configuration, and troubleshooting.Analyze deployment logs and troubleshoot failed patches, software deployments, upgrades, and endpoint/server issues.Develop and execute testing, deployment, rollback, and recovery procedures for production changes.Coordinate maintenance windows, change activities, and production upgrades with infrastructure, security, application, and business teams.Maintain accurate infrastructure inventory, configuration, patch, and lifecycle documentation.Identify systems approaching end-of-life/end-of-support and support upgrade or replacement planning.Develop PowerShell automation to improve patching, administration, compliance, and operational efficiency.

Required Qualifications

5–8+ years of experience administering enterprise endpoint and server environments.Experience supporting 1,000+ endpoints and multi-server environments.Strong hands-on experience with Microsoft Intune and SCCM/Configuration Manager or equivalent.Strong Windows Server administration experience, preferably 2016–2025.Proven experience with enterprise patching, OS upgrades, and vulnerability remediation.Strong troubleshooting and root-cause analysis skills.Experience with production change management, testing, deployment, and rollback processes.Ability to analyze logs and resolve complex deployment and system issues.Strong documentation, communication, and organizational skills.Ability to support scheduled after-hours maintenance when required.

Preferred Qualifications

Microsoft Azure Update ManagerMicrosoft Defender for EndpointWindows AutopilotMicrosoft Entra ID / Azure ADPowerShell scripting and automationLinux server administration and patchingEnterprise vulnerability managementEndpoint security and compliance

Preferred Certifications

One or more of the following certifications is preferred but not required:

Microsoft Certified: Endpoint Administrator Associate (MD-102)Relevant Microsoft Windows Server / Azure certificationCompTIA Security+CompTIA Server+Other relevant Microsoft, cloud, infrastructure, or cybersecurity certifications

Success in This Role

Success means maintaining a secure, stable, compliant, and well-managed enterprise environment, demonstrated by:

High patch and security complianceTimely remediation of critical vulnerabilitiesReliable and controlled production deploymentsMinimal disruption during maintenance and upgradesRapid resolution of failed deploymentsAccurate infrastructure and lifecycle documentationProactive management of aging and end-of-support systems

Equal Opportunity Statement

4A Consulting is an Equal Opportunity Employer committed to an inclusive hiring process. Applicants requiring a reasonable accommodation due to a disability may contact accommodations@4a-consulting.com. This email is intended solely for accommodation requests.

Please note that 4A Consulting participates in the federal E-Verify program. Upon hire, we will provide the federal government with your Form I-9 information to confirm that you are authorized to work in the US. 4A Consulting will only use E-Verify once you have accepted a job offer and completed the Form I-9.